76291373
Jul 27, 2001
Dec 3, 2002
granite product which are manufactured to a uniformly flat surface for use with measuring devices, electronic instrumentation, and other scientific devices and applications requiring a uniformly flat surface, namely, surface plates, angle plates, parallels, vee blocks, straight edges, master squares, triangular master squares, comparator stands, riser blocks, machine bases, beams, rails, columns, and box parallels
Nonmetallic Building Materials